Method for diagnosing high sulfur content in fuel oil

A technology of sulfur content and fuel oil, which is applied to the diagnosis device, measurement device, combustion engine, etc. of exhaust gas treatment devices, which can solve the problems of inability to install sensors, inability to remind drivers whether to add high-sulfur fuel, sulfur sensors and high cost of special equipment

Active Publication Date: 2021-07-30
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of sulfur sensors and special equipment is too high to install sensors on every car, and it is imp

Method used

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  • Method for diagnosing high sulfur content in fuel oil
  • Method for diagnosing high sulfur content in fuel oil
  • Method for diagnosing high sulfur content in fuel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The method for diagnosing high sulfur content in fuel oil of the present embodiment comprises the following steps:

[0037] 1) Diagnostic entry conditions:

[0038] The diagnostic entry conditions must be met at the same time: the engine running time is greater than 600s, the altitude is less than 2400m, the ambient temperature is greater than -10°C, the ambient temperature is less than 40°C, and the vehicle speed is greater than 0. If the set conditions are met, then enter the diagnosis.

[0039] 2) Data processing:

[0040] Based on the calculation of the merit-based window method (the window power can be calibrated) the specific NOx emission of the original machine and the NOx specific emission after spraying. Similar to PEMS regulation requirements, each operating point has a window.

[0041] Count the SCR inlet temperature of the work base window, sort from small to large, find the representative value c of the window temperature, and ensure that the SCR inlet te...

Embodiment 2

[0060] The method for diagnosing high sulfur content in fuel oil of the present embodiment comprises the following steps:

[0061] 1) Diagnostic entry conditions:

[0062] The diagnostic entry conditions must be met at the same time: the engine running time is greater than 600s, the altitude is less than 2400m, the ambient temperature is greater than -10°C, the ambient temperature is less than 40°C, and the vehicle speed is greater than 0. If the set conditions are met, enter the diagnosis.

[0063] 2) Data processing:

[0064] Based on the calculation of the merit-based window method (the window power can be calibrated) the specific NOx emission of the original machine and the NOx specific emission after spraying. Similar to PEMS regulation requirements, each operating point has a window.

[0065] Count the SCR inlet temperature of the work base window, sort from small to large, find the representative value c of the window temperature, and ensure that the SCR inlet temper...

Embodiment 3

[0083] The method for diagnosing high sulfur content in fuel oil of the present embodiment comprises the following steps:

[0084] 1) Diagnostic entry conditions:

[0085] The diagnostic entry conditions must be met at the same time: the engine running time is greater than 600s, the altitude is less than 2400m, the ambient temperature is greater than -10°C, the ambient temperature is less than 40°C, and the vehicle speed is greater than 0. If the set conditions are met, enter the diagnosis.

[0086] 2) Data processing:

[0087] Based on the calculation of the merit-based window method (the window power can be calibrated) the specific NOx emission of the original machine and the NOx specific emission after spraying. Similar to PEMS regulation requirements, each operating point has a window.

[0088] Count the SCR inlet temperature of the work base window, sort from small to large, find the representative value c of the window temperature, and ensure that the SCR inlet temper...

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Abstract

The invention discloses a method for diagnosing high sulfur content in fuel oil. The method comprises the following steps of: 1) diagnosing entering conditions: if a set condition is met, entering diagnosis; 2) data processing: ranking the SCR inlet temperature of a statistical power-based window, from small to large, finding a window temperature representative value c, and judging whether the statistical power-based window is a high-temperature window or a low-temperature window; 3) SCR efficiency statistics: calculating the conversion efficiency of the power-based window, and comparing the conversion efficiency of the power-based window with a set value; 4) SCR performance reduction identification: according to an SCR performance reduction identification condition, judging an SCR performance abnormal mark; 5) high-temperature event identification; (6) SCR efficiency recovery identification; 7) high sulfur indication; and 8) elimination of the high-sulfur fuel oil alarm. According to the method for diagnosing the high sulfur content in the fuel oil, a new sensor and special equipment do not need to be mounted, and whether the sulfur content in the fuel oil is too high or not is determined through logical judgment of information carried by the vehicle, so that a driver is reminded of avoiding using high-sulfur fuel oil and affecting vehicle driving.

Description

technical field [0001] The invention belongs to the technical field of aftertreatment system diagnosis, and in particular relates to a method for diagnosing high sulfur content in fuel oil. Background technique [0002] With the upcoming implementation of the National VI emission regulations, diesel engine manufacturers are currently developing National VI diesel engines. In order to reduce NOx and particulate emissions in the engine exhaust, the National VI diesel engines are matched with catalytic oxidizers (DOC) + particulate filters (DPF ) + selective redox (SCR) aftertreatment system. High sulfur content in fuel will lead to high sulfur content in exhaust, sulfur content will lead to catalyst poisoning, especially SCR catalyst poisoning, SCR conversion efficiency will decrease, resulting in excessive vehicle emissions, which will trigger vehicle torque limit and speed limit, affecting the vehicle drive. [0003] In the prior art, the Chinese invention patent with the ...

Claims

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Application Information

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IPC IPC(8): F02M65/00F01N11/00F01N3/20
CPCF02M65/00F01N11/002F01N3/2066Y02T10/12Y02T10/40Y02A50/20
Inventor 陈旭冯坦陈猛刘凤阳柴启寅陈镇缪斯浩郝宏基余翔宇孟庆慧
Owner DONGFENG COMML VEHICLE CO LTD
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